<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./OL_SDK/include-openlayers-local.js"></script>
    <script src="./libs/gaode.js"></script>
    <script src="./utils/setCanvasStyle.js"></script>
</head>

<body>
    <div id="map">
    </div>
    <script>
        var map = new ol.Map({
            target: "map",
            layers: [gaode],
            view: new ol.View({
                projection: 'EPSG:4326',
                center: [114.30, 30.50],
                zoom: 4
            })
        })
        /* 构建图层 */
        let source = new ol.source.Vector({})
        let layer = new ol.layer.Vector({
            source,
            style: setCanvasStyle(map, 40, 0.5)
            // (map, canvas_size, speed) // speed每20毫秒变化的像素数
        })
        map.addLayer(layer)
        /* 要素 */
        let point = new ol.Feature({
            geometry: new ol.geom.Point([114.30, 30.50])
        })
        source.addFeature(point)
    </script>
</body>

</html>